With more and more people migrating away from Microsoft's platforms, it's increasingly important for
alternative operating systems to be well documented in order to attract and maintain new users.
FreeBSD is already well documented; its
on-line handbook is an extremely well detailed guide to the
OS as a whole. But for the user new to FreeBSD, or even Unix as a whole, salvation may come in the form of
SAMS' FreeBSD Unleashed by Michael Urban
and Brian Tiemann.